S.B. No. 15 introduces new regulations regarding size and density requirements for residential lots in certain municipalities in Texas. The bill establishes a new Subchapter D in Chapter 211 of the Local Government Code, which defines terms such as "housing organization" and "small lot." It applies specifically to municipalities with populations over 150,000 that are located in counties with populations exceeding 300,000. The bill prohibits municipalities from enforcing ordinances that require residential lots to be larger than 3,000 square feet, wider than 30 feet, or deeper than 75 feet. Additionally, it restricts regulations that would prevent single-family homes from being built on lots of at least 3,000 square feet.

The bill also outlines provisions for small lots, stating that municipalities cannot impose excessive setbacks, parking requirements, or other zoning restrictions that conflict with the new regulations. However, municipalities may still enforce certain requirements related to environmental features and can charge permitting and impact fees. The legislation allows individuals or housing organizations adversely affected by violations of this subchapter to take legal action against municipalities, with courts able to issue declaratory judgments, writs of mandamus, and injunctions. The act is set to take effect on September 1, 2025.

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